Finding the Fourth Proportional to 17,980.74, 24,812.49 and 9,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,980.74 : 24,812.49 = 9,915.72 : x
2. Step 2: Convert to fraction form
   17,980.74/24,812.49 = 9,915.72/x
3. Step 3: Cross multiply
   17,980.74x = 24,812.49 × 9,915.72
4. Step 4: Simplify right side
   17,980.74x = 246,033,703.34
5. Step 5: Solve for x
   x = 246,033,703.34/17,980.74
6. Step 6: Final answer
   x = 13,683.18